First National Bank of Louisiana also offers a Sweep Service, which is your authorized transfer of funds from one FNB account to another in the event of an overdraft. Sweep transfers take place in $100 increments; however, the last $50 will not be swept from the sweep account. You must maintain a balance exceeding this minimum amount to be eligible for Sweep Services. Sweep activity is limited, as required by law, if withdrawals are from an interest bearing account.